Internal-grinding-wheel bearing.



Patented Nov 11,1913.

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H.T.-SHEARER. IN'IERITAL GRINDING WHEEL BEARNG.

.APPLIOATIONFILBD 00T. 11, 1910. RENEWBD SEPT. 29, 1'913. 1,078,560..

,tnnlieeton med tletober lil, 122m, Serial No. 52E/*75,5379* Renewed September ell toom imojy conce/m it known thz'tt lit, HARRY T. nunucm o the Unit-ell ftetee, residing; et to? in the county,YV ot Feunltlin and i eimeylvzanie, have invented eerand ueetnl lnlpt'oYenionte in lnindi t/theel lleminne7 o which the itiollowinj. 1e n specification.

.ln the use et grinding wheels on grinding; nieohines for lnteifnnl grinding-, considerable trouble vhee heen experienced in providing-g e, support for Ahe outei.l end ot the grinding wheel spindle that will hold seid l .grinding wheel Steady :und avoid chatter 7,

ot' Vihietin. rlhiii is especially tr utter the 'howling line omonn wf "nr "lllie ohjei-'xt of. my seid invention is, therettlote to provide zt homing- 'or the outer end ol the grinding? Wheel. spindle oit' intel-nal gt'inding tintin tot" nee on grinding me clinton, =,vhioh will afford o hezning that will. hold the Spindle to l'un tl'uc end steady, und ,that tney he ediueted to nieintuine close hearing; und eteedy snijlnott et ull time@` ell ne will he E eeinultcf more fully described und clnlmed.

Keitel-rin to the :weoinpfmyingi drfnwii'lne,' which :we inode e, 'port hereof' und on which einlihn 1'( moe ehumotove indiouie ein1i lon nul-ts, gute l' is u top or plan View of on internal grinding lib; entre for use on grinding machines zml "une my' Lmid in 'votation Fig intel. eeetiot'r. thoe t l elevan lion5 ond F151" the-dotted` ln fl, in

enid elmuln Y noitione meri-,Zed represent the heee u ne tintin-e, ,il z, hee-1@ ine" fnlppm'tinn" tulle er sleeve und C the @Finding wheel spindle.,

The hase/t ie u meting of n usuel, or any eppronete ioifxn, edepted to he seem-'ed to the grinding Wheel hase hy ineens of bolts insel'tedthrough the slote o!t :te is usuel. lt is formed with e troneveree boro to receive endsuppoet the bearings for the grinding 'Wheel spindle. lts outer edge ie Split und connected by screws l0, 11, 12 and 18 which extend across thesplit through e perfomtion in the projecting top llenges, or ears, a and into a, screw-threaded perforation in the lower Plongee, or eers, a2, ue heeft shown in The sleeve B '1e formed et .ite lnneil end -Epeeifieetlen et Letters Eatent.

""-l i913. Seal No. MEELLLBL aou,

thimhle from roietion. Suid sleeve B is of e lengtlgi to extend outward the distance from the huso necessary to project into the work ne required end afford o. neming for the spindle close to the grind, wheel. 'ltheonter end of its here foilned lightly flared, o1 of increasing diameter from e point heck fi'oln its end, as ut n point mznlted ,an to its outer end. .lin this portion ie mounted u'splt huehinn; l@ the outei.` ein :linee of which i5 ooireeponcliugly tapered to lt within the outer' end of said sleeve. Seid bushing is of bronze, or other appropriate materiel` adopted to m'niele Suitable hearing' for the outer end o Spindle C, which l te'enn V therein. Seldepindle C has the pmndnu; wheel c mounted. on ite outer end,

l() hushiin when sleeve B is hooked on said thixnhle end thus 'force Said loushinon ont of saidl sleeve. Said Spindle is preferably formed in two parts, the rem? end C2 being connected to the front end C by e Socket o2 onthe rear end of seid part C into which the 'front endet the mrt C2 is inserted, said front end of putt C2 heine` formed with n tranevexfse notch which emh aces a pin c3 extending transveisely through seid socket. Bearing blocks C3' and C* are mounted in Ithe here in the base A in which saidpert C? is journeled, e pulley C5 being); mounted hetween seid .bearings for the driving belt.

here to engage :amid noi-,eh and hold said the work proceeds.

dit'

Suitable oil cups are shown, and other de tailsof construction and arrangement, but

not particularly described, being common inl this class of devices and readily understood from the drawing.

in use, the parts being adjusted as shown in Fig. 2, and the bearing in the bushing 16 becoming loose by wear, the operator loosens clamp's'crews 10 and 11 suiiiciently to permit sleeve B to be turned therein. He then seizes said sleeve around the lrnurle'd portions b and turning it on the thimble B forces it outwardly over the split bushing 16 compressing said bushing tightly upon the outer end of spindle C. He then gives said sleeve a backward turn, suicient to relieve the bushing from a clamping hold upon the spindle but still holding it in close turning relation thereto. This may loosen the end bearing between lthe end of sleeve 16 and inner face of base C, but a slight forward turn will adjust the parts again so that the end thrust of the spindle between base C and washer ct will permit no lost r motion or reciprocal vibration. The clamping screws and 11 are then tightened and By this construction and in the manner described, from time to time, the bearing is tightened, or closed up, to keep the parts in close relation and prevent vibration, thus prolonging the life of the bearing and securing accurate and true grinding at`all times. The bearing being close to the grinding wheel said wheel is given a firm support and being a snug running bearing at all times the wheel is held from vibration and perfect results are secured. When it is desired to loosen the bearing, it can be readily done by reversing the operation above described, that is, loosen the clamp screws 10 and 11 and back the sleeve B oit bushing 16, tube 20 holding said bushing outward as said sleeve turns back thus' nordsee internal dle mounted within said sleeve and journaled at its outer end in said bushing, and at its inner end4 extending through said thimble, and the grinding wheel mounted on the outer end of said spindle, substantially as set fort-h.

2. The combination in an internal grinding iXture for grinding machines, of a bearing supporting sleeve with a thirnble screwthi'eaded into its inner end, meansfor locking said thimble, means for clamping said sleeve, a bushing mounted in the outer end of said sleeve by a tapered engagement, a grinding wheel spindle mounted within said sleeve with its outer end journaled inv said bushing, a grinding wheel mounted on the outer end oi said spindle with its base bearing against the outer end of said bushing, and a distance tube between the inner end of said bushing and the adjacent end of said thimble, substantially as set forth.

v In witness whereof, I, have hereunto set my hand and seal at 'Vaynesboro, Pennsylvania this 28th day of September, A. D. nineteen hundredv and ten.

HARRY T. SHEARER. [n s] `Witnessesz E. R. SPRENKLE, CHAs. B. CLAYTON. 

